noun. An official pass or permit, especially one for crossing national boundaries.

noun. A book of postage stamps.

noun. A customs document that allows the temporary duty-free importation of a particular article

noun. A collection of travel tickets in the form of a booklet that is sold at a discount

"Off to jot them down in my carnet ... just after I deal with that stuttering f in the French stapler ... merci beaucoup!"